May be your spray technique. Keep the gun parallel to the surface. Start moving the gun, pull the trigger, make as long of a stroke as you can keeping parallel, release trigger, follow through stroke, overlap the previous coat 50-75 percent with your next pass in the opposite direction you sprayed the first time, doing the whole starting to move the gun before pulling the trigger, keeping parallel, realeasing trigger before stopping your stroke thing. Just takes some practice to get the hang of. If you notice dry areas while painting him them areas with more paint while still wet. The dry streaks could be not keeping the gun parallel or overlapping enough. Also slow activator like fleet said will give you more time to get around and get it looking good.